References
- Rodgers , C. A. 1993 . J. Intel. Mat. Syst. Struct. , 4 ( 1 ) : 4
- Newnham , R. E. and Ruschau , G. R. 1991 . J. Am. Ceram. Soc. , 74 ( 3 ) : 463
- Newnham , R. E. 1990 . Ferroelectrics , 102 : 259 – 266 .
- Noblanc , O. and Gaucher , P. 1994 . Ferroelectrics. , 160 : 145 – 155 .